Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Sep. 30, 2016	Sep. 30, 2015
ASSETS
Valuation allowance for deferred income taxes	$ 10.3	$ 10.1
EQUITY
Preferred stock, par value	$ 0.10	$ 0.10
Preferred stock, shares authorized	30,000,000	30,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	380,123,258	375,847,442
Common stock, shares outstanding	372,923,187	368,647,371
Treasury stock, shares	7,200,071	7,200,071